plugs directly into the motherboard. The CPU is seated in the CPU tray, and is connected by the motherboard to PCIe lanes, which in turn connect the processor to other hardware components. All case fans and coolers connect to headers on the motherboard, as do the case's LED, reset, and power button cables, and RAM is seated in the motherboard's DIMM slots. Motherboards' compatibility with other components is determined primarily by its CPU socket type, which must be compatible with the processor intended for use, and its chipset. Central processing unit The CPU is mainly responsible for computing physics, AI and central game processes. Modern gaming PCs use high-end processors. With the rise of multi-threaded games, multi-core processor setups have become more necessary, providing better performance by offloading work to all available cores at once. Furthermore, an ample amount of L2 Cache within the CPU, generally 4 MB or more, is recommended to reap the benefits of even faster game performance. In addition, a gaming processor should be capable of running at least the SSE3 instruction set extension, which is available with CPUs produced since at least 2006. Graphics Gaming PCs use hardware accelerated video cards which offer high-end rasterisation-based rendering/image quality. A graphics card is the most important component, being the main determining factor of the capabilities of a gaming PC. Memory capacity on 3D cards is usually at least 256 MB to 12 GB. The amount of video RAM is more important while gaming in higher resolution or using high resolution textures, and/or with extensive modding. Having at least 2GB to 4GB of VRAM or more is suggested for today's standards when gaming. The type of memory used, however, is an important factor. The current VRAM standards are GDDR5, GDDR5X, GDDR6, GDDR6X and HBM2. VRAM standards meaning the type of memory used in the cards manufacturing. GDDR5 and GDDR6 are generations of GDDR, whereas the GDDR5x and 6x variants denote a speed increase over their non-x counterparts. HBM2 memory is generally slower however it comes with the benefit of having massive capacities. Modern graphics cards use the PCI Express expansion slot. Two or more graphics cards can be used simultaneously on motherboards supporting SLI or ATI CrossFire technology, for Nvidia and AMD based cards respectively. Both technologies allow for between two and four graphics cards, although Nvidia recommends only using multiples of the same model, to be used